Egan, Joanne; Allott, Timothy E H; Blackford, Jeffrey J (2018): Diatom counts and stratigraphic analyses from Moss Lake, Washington, USA [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.890670, Supplement to: Egan, J et al. (2019): Diatom-inferred aquatic impacts of the mid-Holocene eruption of Mount Mazama, Oregon, USA. Quaternary Research, 91(1), 163-178, https://doi.org/10.1017/qua.2018.73
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Abstract:
High-resolution diatom stratigraphies from mid-Holocene sediments taken from fringe and central locations in Moss Lake, a small lake in the foothills of the Cascade Range, Washington, have been analysed to investigate the impacts (and duration) of tephra deposition on the aquatic ecosystem. Up to 50 mm of tephra was deposited from the climactic eruption of Mount Mazama 7958-7795 cal yr BP, with coincident changes in the aquatic ecosystem. The diatom response from both cores indicates a change in habitat type following blanket tephra deposition, with a decline in tychoplanktonic Fragilaria brevistriata and Staurosira venter and epiphytic diatom taxa indicating a reduction in aquatic macrophyte abundance. Additionally, the central core shows an increase in tychoplanktonic Aulacoseira taxa, interpreted as a response to increased silica availability following tephra deposition. However, partial redundancy analysis provides only limited evidence of direct effects from the tephra deposition, and only from the central core, but significant effects from underlying environmental changes associated with climatic and lake development processes. The analyses highlight the importance of duplicate analyses (fringe and central cores) and vigorous statistical analyses for the robust evaluation of aquatic ecosystem change.
Related to:
Egan, Joanne; Fletcher, William J; Allott, Timothy E H; Lane, Christine S; Blackford, Jeffrey J; Clark, Douglas H (2016): The impact and significance of tephra deposition on a Holocene forest environment in the North Cascades, Washington, USA. Quaternary Science Reviews, 137, 135-155, https://doi.org/10.1016/j.quascirev.2016.02.013
Coverage:
Latitude: 47.693300 * Longitude: -121.846800
Date/Time Start: 2013-07-01T00:00:00 * Date/Time End: 2014-06-01T00:00:00
Comment:
Data has been obtained from lake sediment cores from Moss Lake, Washington. Two cores were taken, one from the centre (MLC) and one from the fringe (MLF).
Radiocarbon dates are provided in Egan et al (2016).
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
4 datasets
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Datasets listed in this publication series
- Egan, J; Allott, TEH; Blackford, JJ (2018): Diatom counts from sediment core MLC from the center of the Moss Lake, Washington, USA. https://doi.org/10.1594/PANGAEA.890665
- Egan, J; Allott, TEH; Blackford, JJ (2018): Stratigraphic analyses of sediment core MLC from the center of the Moss Lake, Washington, USA. https://doi.org/10.1594/PANGAEA.890666
- Egan, J; Allott, TEH; Blackford, JJ (2018): Diatom counts from sediment core MLF from the fringe of the Moss Lake, Washington, USA. https://doi.org/10.1594/PANGAEA.890668
- Egan, J; Allott, TEH; Blackford, JJ (2018): Stratigraphic analyses of sediment core MLF from the fringe of the Moss Lake, Washington, USA. https://doi.org/10.1594/PANGAEA.890669